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Ted Kaehler
Ted Kaehler (born 1950) is an American computer scientist known for his role in the development of several system methods. He is most noted for his contributions to the programming languages Smalltalk, Squeak, and Apple Computer's HyperCard system, and other technologies developed at Xerox PARC. Background Kaehler is a son of a mechanical engineer and grew up tinkering with mechanical toys. During the 1960s, he built a computer on his own following an article published in ''Scientific American''. He went to Gunn High School, a public school in Palo Alto, California. He graduated in 1968. While in high school, Kaehler was accepted to a summer job at then named Fairchild Industries. During this work, he learned the programming language Fortran. During his high school days, he was introduced to his first computer, an IBM 1620, operated by the Palo Alto Unified School District. Kaehler then attended Stanford University to study physics, studied programming under Donald Knuth, l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palo Alto
Palo Alto (; Spanish for "tall stick") is a charter city in the northwestern corner of Santa Clara County, California, United States, in the San Francisco Bay Area, named after a coastal redwood tree known as El Palo Alto. The city was established in 1894 by the American industrialist Leland Stanford when he founded Stanford University in memory of his son, Leland Stanford Jr. Palo Alto includes portions of Stanford University and borders East Palo Alto, Mountain View, Los Altos, Los Altos Hills, Stanford, Portola Valley, and Menlo Park. At the 2020 census, the population was 68,572. Palo Alto is one of the most expensive cities in the United States in which to live, and its residents are among the most educated in the country. However, it also has a youth suicide rate four times higher than the national average, often attributed to academic pressure. As one of the principal cities of Silicon Valley, Palo Alto is headquarters to a number of high-tech companies, includi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
System Software
System software is software designed to provide a platform for other software. Examples of system software include operating systems (OS) like macOS, Linux, Android and Microsoft Windows, computational science software, game engines, search engines, industrial automation, and software as a service applications. Application software is software that allows users to do user-oriented tasks such as create text documents, play or develop games, create presentations, listen to music, draw pictures or browse the web. In the late 1940s, the early days of computing, most application software was custom-written by computer users to fit their specific hardware and requirements. System software was usually supplied by the manufacturer of the computer hardware and was intended to be used by most or all users of that system. Many operating systems come pre-packaged with basic application software. Such software is not considered system software when it can be uninstalled without affecting th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xerox Alto
The Xerox Alto is a computer designed from its inception to support an operating system based on a graphical user interface (GUI), later using the desktop metaphor. The first machines were introduced on 1 March 1973, a decade before mass-market GUI machines became available. The Alto is contained in a relatively small cabinet and uses a custom central processing unit (CPU) built from multiple SSI and MSI integrated circuits. Each machine cost tens of thousands of dollars despite its status as a personal computer. Only small numbers were built initially, but by the late 1970s, about 1,000 were in use at various Xerox laboratories, and about another 500 in several universities. Total production was about 2,000 systems. The Alto became well known in Silicon Valley and its GUI was increasingly seen as the future of computing. In 1979, Steve Jobs arranged a visit to Xerox PARC, during which Apple Computer personnel would receive demonstrations of Xerox technology in exchange for Xero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dan Ingalls
Daniel Henry Holmes Ingalls Jr. (born 1944) is a pioneer of object-oriented computer programming and the principal architect, designer and implementer of five generations of Smalltalk environments. He designed the bytecoded virtual machine that made Smalltalk practical in 1976. He also invented bit blit, the general-purpose graphical operation that underlies most bitmap computer graphics systems today, and pop-up menus. He designed the generalizations of BitBlt to arbitrary color depth, with built-in scaling, rotation, and anti-aliasing. He made major contributions to the Squeak version of Smalltalk, including the original concept of a Smalltalk written in itself and made portable and efficient by a Smalltalk-to- C translator. Education Ingalls received his Bachelor of Arts (B.A.) in physics from Harvard University, and his Master of Science (M.S.) in electrical engineering from Stanford University. While working toward a Doctor of Philosophy (Ph.D.) at Stanford, he started ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
APL (programming Language)
APL (named after the book ''A Programming Language'') is a programming language developed in the 1960s by Kenneth E. Iverson. Its central datatype is the Array data type#Multi-dimensional arrays, multidimensional array. It uses a large range of APL syntax and symbols, special graphic symbols to represent most functions and operators, leading to very concise code. It has been an important influence on the development of concept modeling, spreadsheets, functional programming, and computer math packages. It has also inspired several other programming languages. History Mathematical notation A mathematical notation for manipulating arrays was developed by Kenneth E. Iverson, starting in 1957 at Harvard University. In 1960, he began work for IBM where he developed this notation with Adin Falkoff and published it in his book ''A Programming Language'' in 1962. The preface states its premise: This notation was used inside IBM for short research reports on computer systems, such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physics
Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." Physics is one of the most fundamental scientific disciplines, with its main goal being to understand how the universe behaves. "Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palo Alto Unified School District
The Palo Alto Unified School District is a public school district located near Stanford University in Palo Alto, California. It consists of twelve primary schools, three middle schools, two high schools, and an adult school. History The district itself was founded on March 20, 1893, with the first school opening in September of that year. Enrollment grew until it reached a peak of 15,576 students in 1967. Afterwards, enrollment declined sharply, forcing the district to close many schools. Enrollment was at its lowest in 1989 with only 7,452 students.Jane Lathrop Stanford Middle School Website - History Retrieved March 1, 2008 Jordan Middle School was reopened when enrollment increased again. Barron Park Elementary School was added in 1998, and Terman Middle School was reopened in 2001. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 1620
The IBM 1620 was announced by IBM on October 21, 1959, and marketed as an inexpensive scientific computer. After a total production of about two thousand machines, it was withdrawn on November 19, 1970. Modified versions of the 1620 were used as the CPU of the IBM 1710 and IBM 1720 Industrial Process Control Systems (making it the first digital computer considered reliable enough for real-time process control of factory equipment). Being variable-word-length decimal, as opposed to fixed-word-length pure binary, made it an especially attractive first computer to learn on and hundreds of thousands of students had their first experiences with a computer on the IBM 1620. Core memory cycle times were 20 microseconds for the (earlier) Model I, 10 microseconds for the Model II (about a thousand times slower than typical computer main memory in 2006). The Model II was introduced in 1962. Architecture Memory The IBM 1620 was a variable "word" length decimal ( BCD) computer with a mag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fairchild Aircraft
Fairchild was an American aircraft and aerospace manufacturing company based at various times in Farmingdale, New York; Hagerstown, Maryland; and San Antonio, Texas. History Early aircraft The company was founded by Sherman Fairchild in 1924 as Fairchild Aviation Corporation, based in Farmingdale, and East Farmingdale, New York. It was established as the parent company for Fairchild's many aviation interests. The company produced the first US aircraft to include a fully enclosed cockpit and hydraulic landing gear, the Fairchild FC-1. At some point, it was also known as the Fairchild Aircraft Manufacturing Company. The Fairchild Aircraft Ltd. of Longueuil, Quebec, Canada was an aircraft manufacturer during the period of 1920 to 1950, which served as a subsidiary of the Fairchild company of the United States. The Fairchild Engine Company was formed with the purchase of the Caminez Engine Company in 1925. In 1929, Sherman Fairchild purchased a majority stock interest in Kre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palo Alto, California
Palo Alto (; Spanish language, Spanish for "tall stick") is a charter city in the northwestern corner of Santa Clara County, California, United States, in the San Francisco Bay Area, named after a Sequoia sempervirens, coastal redwood tree known as El Palo Alto. The city was established in 1894 by the American industrialist Leland Stanford when he founded Stanford University in memory of his son, Leland Stanford Jr. Palo Alto includes portions of Stanford University and borders East Palo Alto, California, East Palo Alto, Mountain View, California, Mountain View, Los Altos, California, Los Altos, Los Altos Hills, California, Los Altos Hills, Stanford, California, Stanford, Portola Valley, California, Portola Valley, and Menlo Park, California, Menlo Park. At the 2010 United States Census, 2020 census, the population was 68,572. Palo Alto is one of the most expensive cities in the United States in which to live, and its residents are among the most educated in the country. Howeve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gunn High School
Henry M. Gunn Senior High School is one of two public high schools in Palo Alto, California, the other being Palo Alto High School. Established in , Gunn High School was named after Henry Martin Gunn, who served as the Palo Alto superintendent from 1950 to 1961. In 1964, the Palo Alto Unified School District announced that it would name the district's third high school after him. The Class of 1966 was the first class to graduate from Gunn High School. 1,993 students attended the school in the 2019–2020 school year. In 1992, the school was honored as a California Distinguished School. History The land under Gunn High School was purchased by the school district from Stanford University for $358,641 (), under the condition that it could not be sold to another entity. Gunn High School opened in August 1964 with an initial enrollment of 600 students, comprising 300 sophomores and 300 juniors. It was named after Henry Gunn, the superintendent of the Palo Alto Unified School Distric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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